STG3157
Low voltage low on-resistance SPDT switch
with break-before-make feature
Features
■
High speed:
– t
PD
= 0.3 ns (max) at V
CC
= 4.5 V
– t
PD
= 0.8 ns (max) at V
CC
= 3.0 V
– t
PD
= 1.2 ns (max) at V
CC
= 2.3 V
Ultra low power dissipation:
– I
CC
= 1 µA (max) at T
A
= 85 °C
Low on-resistance; at V
IN
= 0 V:
– R
ON
= 7
Ω
(max T
A
= 85 °C) at V
CC
= 4.5 V
– R
ON
= 9
Ω
(max T
A
= 85 °C) at V
CC
= 3.0 V
Wide operating voltage range:
– V
CC
(OPR) = 1.65 V to 5.5 V single supply
TTL threshold ON control input at
V
CC
= 2.7 to 3.6 V
Pin and function compatible with 74 series
3157
Latch-up performance exceeds
150 mA (JESD 17)
SOT323-6L
■
■
■
■
■
■
(connected to common port D) when the IN input
is held high, and OFF (a high impedance state
exists between the two ports) when IN is held low.
Switch S2 is ON (connected to common port D)
when the IN input is held low and OFF (a high
impedance state exists between the two ports)
when IN is held high.
Additional key features are fast switching speed,
break-before-make delay time, and very low
power consumption. All inputs and outputs are
equipped with protection circuits to protect
against static discharge, giving them immunity
from ESD and transient excess voltage.
Description
The STG3157 is a high-speed CMOS analog
SPDT (single-pole double-throw) switch or 2:1
multiplexer/demultiplexer bus switch
manufactured using silicon gate C
2
MOS
technology. It is designed to operate from a
1.65 V to 5.5 V supply, making the device ideal for
portable applications.
The STG3157 features very low on-resistance
(< 9
Ω)
at V
CC
= 3.0 V. The IN input is provided to
control the SPDT switch, and is compatible with
standard CMOS output. Switch S1 is ON
Table 1.
Device summary
Order code
STG3157CTR
Package
SOT323-6L
Packing
Tape and reel
April 2010
Doc ID 9007 Rev 2
1/18
www.st.com
18
Contents
STG3157
Contents
1
2
3
Pin connections and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
3.2
3.3
DC Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
AC Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Analog switch characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4
5
6
Test circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
Doc ID 9007 Rev 2
Electrical ratings
STG3157
2
Electrical ratings
Stressing the device above the ratings listed in the “Absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.
Table 4.
Symbol
V
CC
V
I
V
IC
V
O
I
IKC
I
IK
I
OK
I
O
I
CC
or I
GND
T
stg
T
L
Supply voltage
DC input voltage
DC control input voltage
DC output voltage
DC input diode current on control pin (V
IN
< 0V)
DC input diode current (V
IN
< 0V)
DC output diode current
DC output current
DC V
CC
or ground current
Storage temperature
Lead temperature (10 s)
Absolute maximum ratings
Parameter
Value
-0.5 to +7.0
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±50
±50
±20
+128
±100
-65 to 150
300
Unit
V
V
V
V
mA
mA
mA
mA
mA
°C
°C
Table 5.
Symbol
V
CC
V
I
V
IC
V
O
T
op
dt/dv
Recommended operating conditions
Parameter
Supply voltage
(1)
Input voltage
Control input voltage
Output voltage
Operating temperature
Input rise and fall time
control input
V
CC
= 1.65V to 2.7V
V
CC
= 3.0 to 4.5V
Value
1.65 to 4.5
0 to V
CC
0 to 5.5
0 to V
CC
-55 to 125
0 to 20
ns/V
0 to 10
Unit
V
V
V
V
°C
1. Truth table guaranteed: 1.2 V to 6.0 V
4/18
Doc ID 9007 Rev 2
MCU
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